Improvement in the manufacture of paper



UNITED STATES PATENT QFFIGE.

TAL. P. SHAFENER, OF LOUISVILLE, KENTUCKY.

' IMPROVEMENT IN THE MANUFACTURE OF PAPER.

Specification forming part of Letters Patent No. 59,2Sl."dated October30, 1866 antedated October 17, 1866.

To all whom it may concern:

Be it known that I, TALIAFERRO P. Sarina mm, of Louisville, Jeffersoncounty, State of Kentucky, have made new and useful Improvements in theManufacture of Paper suitable for bank notes, promissory obligations,evidences of debt, and many other purposes; and I hereby declare thefollowing to be a full, clear, and exact description of thenature'andprocess of manufacture of the same, sufficient to enable one skilled inthe art to which it appertains to manufacture and use the same.

My invention consists in the method of manufacturing paper after thepulp for making it has been fully prepared by adding to the pulpmetallic powder or filings, or otherwise placing metal in the body ofthe paper.

My process consists in having a perforated cylinder adjusted to revolveimmediately behind the mechanism that receives the pulp distribute themetallic powder into the pulp at any time before it becomes paper.

The metallic powder maybe mixed with benzinc and precipitated into thepulp by mixing, or it may be otherwise injected into the pulp or paper.

I employ another process to put metal in the body of the sheet, namely:I coat either one or both sides of the paper (of any desired length andwidth) with a solution of indiarubber or caoutchouc dissolved in benzineor other solvent liquid. This coating may be made with a-brush, or thepaper may be carried between felt rollers saturated with the solution.The benzine is then allowed to evaporate, leaving upon the surface ofthe paper a thin coating of india-rubber. I then cover the whole withmetallic powder, which may be done with a brush, or the sheet of papermay be carried between rollerswith' fixed brushes of fine hair thereon,so as to allow the brushes to spread the powder over the entire surfaceof the paper.

I employ another plan, namely: I mix the metallic powder with thesolution, and then spread the compound upon the paper by means of feltrollers saturated with the said mixture.

employed to produce intelligible marks or symbols.

The deposit of yellow metal powder to form a part of the body of thepaper, or as a covering, as hereinbefore described, willpreventsuccessful counterfeiting, as the color yellow cannot betransferred by the photographic art, and the metallic part or partscannotbe removed from the paper thusprepared, by chemical action orotherwise, without destroying the paper. When a coating of pulp has beenplaced over the metallic surface the same result will be effected.

Having described my invention, what I claim therein as new, and desireto secure by Letters Patent, is-

1. The depositing distributively in pulp one or more kinds of metallicpowder immediately a before said pulp is woven into paper, the objectbeing to scatter the metallic particles into the body of the papermanufactured from said pulp, substantially as hereinbefore described.

2. The covering or saturating paper with dissolved caoutchouc orindia-rubber for the purpose of holding metallic powder upon the surfaceof or for carrying the said powder'into the body of the paper covered orsaturated, substantially as hereinbefore described.

3. The manufacturing of paper by placing upon an inner surface thereof acoating of dissolved india-rubber or caoutchouc, either mixed or unmixedwith metallic powder, or by spreading the powder over the surface of theindia-rubber coating, contemplating the covering of said metallizedsurface with a film of paper woven thereon from pulp, or by pressinganother sheet of paper in such manner as will unite the wholepractically as one body of paper, substantially as hereinbeforedescribed.

TAL. P. SHAFFNER.

"Witnesses:

EDW. F. BROWN, R. P. ANDERSON.

